CAJ | 학술논문

传统的基于光线投射算法的体数据等值面可视化方法采用三线性插值用于求交计算,误差较大. 提出一种基于7方向Box样条的等值面可视化算法,改进插值和梯度计算的精度,采用多种体数据属性值和梯度幅值相结合的颜色映射传输函数. 由于7方向Box样条具有C2 连续性,体数据标量值、梯度和曲率的计算都是精确的,算法可实现高精度的等值面可视化效果.
전통적기우광선투사산법적체수거등치면가시화방법채용삼선성삽치용우구교계산,오차교대. 제출일충기우7방향Box양조적등치면가시화산법,개진삽치화제도계산적정도,채용다충체수거속성치화제도폭치상결합적안색영사전수함수. 유우7방향Box양조구유C2 련속성,체수거표량치、제도화곡솔적계산도시정학적,산법가실현고정도적등치면가시화효과.
The traditional method of volumetric data iso-surface visualization based on ray casting using tri-linear interpolation for intersection calculation.This method produces large error.This paper adopts a method based on the seven-directional box spline to implement iso-surface visualization in order to improve the interpolation and gradient calculation accuracy.It uses color mapping transfer function with the combination of a variety of volumetric data attribute value and gradient magnitude.Because it's C2 continuous, the scalar value,gradient and curvature calculation of the volumetric data is accurate,and it can achieve high precision level visualization effect.